CVE-2021-42697
Uncontrolled Recursion in Akka HTTP
7.5
HIGH
CVSS 3.1
EPSS 75.5%
Description
Akka HTTP 10.1.x and 10.2.x before 10.2.7 can encounter stack exhaustion while parsing HTTP headers, which allows a remote attacker to conduct a Denial of Service attack by sending a User-Agent header with deeply nested comments.
How to fix CVE-2021-42697
To remediate CVE-2021-42697, upgrade the affected package to a fixed version below.
- Maven/com.typesafe.akka:aakka-http-core_2.13.0-M3—no fix listed
- —upgrade to 10.1.15 or later
- —upgrade to 10.1.15 or later
- —upgrade to 10.1.15 or later
- —no fix listed
- —no fix listed
- —no fix listed
Is CVE-2021-42697 being exploited?
Likely — EPSS is 75.5%, placing CVE-2021-42697 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (7)
- >= 10.1.0
- >= 10.1.0, < 10.1.15
- >= 10.1.0, < 10.1.15
- >= 10.1.0, < 10.1.15
- >= 10.1.0
- >= 10.1.0
- >= 10.1.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |